You pays your money and you takes your pick: Yes, No, Maybe. It comes down to your definition of ‘extension’. Is it “anything after the last dot in the name”? If so, those files have no name and are all extension. Is it “anything after a dot that isn’t the first character in the name”? … Read more
Y = (-5.79829066331+4.55640490659j) Z = (Y.real, Y.imag) A = Y.real B = Y.imag BTW: More: Python: Complex number – real and imaginary part
Method 1 for %%F in (“C:\Documents and Settings\Usuario\Escritorio\hello\test.txt”) do echo %%~nxF Type HELP FOR for more info. Method 2 call :sub “C:\Documents and Settings\Usuario\Escritorio\hello\test.txt” exit /b :sub echo %~nx1 exit /b Type HELP CALL for more info.
If you want “bad” filenames to generate an error: if (Path.GetFileName(fileName) != fileName) { throw new Exception(“‘fileName’ is invalid!”); } string combined = Path.Combine(dir, fileName); Or, if you just want to silently correct “bad” filenames without throwing an exception: string combined = Path.Combine(dir, Path.GetFileName(fileName));
This works fine: os.path.join(dir_name, base_filename + ‘.’ + filename_suffix) Keep in mind that os.path.join() exists only because different operating systems use different path separator characters. It smooths over that difference so cross-platform code doesn’t have to be cluttered with special cases for each OS. There is no need to do this for file name “extensions” … Read more
This will remove all invalid characters anywhere in the filename based on Ismail’s invalid character set (I have not verified how complete his set is). – (NSString *)_sanitizeFileNameString:(NSString *)fileName { NSCharacterSet* illegalFileNameCharacters = [NSCharacterSet characterSetWithCharactersInString:@”/\\?%*|\”<>”]; return [[fileName componentsSeparatedByCharactersInSet:illegalFileNameCharacters] componentsJoinedByString:@””]; } Credit goes to Peter N Lewis for the idea to use componentsSeparatedByCharactersInSet: NSString – Convert … Read more
DateTime.Now.ToString(“dd_MM_yyyy”)
Just for completeness: How could this be achieved without Regular Expressions? var input=”myfile.png”; var output = input.substr(0, input.lastIndexOf(‘.’)) || input; The || input takes care of the case, where lastIndexOf() provides a -1. You see, it’s still a one-liner.
Wikipedia and the Google Common Lisp Style guide both suggest .lisp. Practical Common Lisp suggests .lisp or .cl. Note, I’m not a Common Lisp programmer by any measure, so I have no idea if .lisp is actually used in practice.